I had a Dynamo basically identical but not a coin-op. Plays similar but not the same. They tend to have numerous "dead" men; not as precisely molded as Tornado so they tend to be loose on the rods.
The big difference is the men are a bit shorter so there's a larger gap between the man and the table surface, which changes your timing when pinning the ball. It also affects your stroke on shots as it results in a different pinch point.
I bought mine for $100 so it wasn't that big of a deal. You get used to it but will definitely throw you off when moving to a Tornado. I did put Tornado bumpers on as the stock ones are crap.